I am looking for the lyrics to "Ode to Joy". A recording is at this link: https://m.soundcloud.com/user394434059/05-march-from-a-clockwork-orange-ninth-symphony-fourth-movement-abridged
Beethoven's Symphony No. 9, Fourth Movement - An Die Freude ("Ode to Joy").
Full lyrics and English translation are on the Wikipedia page linked above. The lyrics, which are in German, are from a poem by Friedrich Schiller.
Here's a video with lyrics and English translation following the symphonic version: https://www.youtube.com/watch?v=4pbMUEHvoAo
This track and much of the synthesizer music on that soundtrack was arranged and performed by Wendy Carlos, who is probably best known for "Switched-On Bach". She went on to work with Kubrick again, composing much of the soundtrack for "The Shining".